CLC number: TH117.2
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2018-10-10
Cited: 0
Clicked: 5717
Citations: Bibtex RefMan EndNote GB/T7714
Bing-qing Wang, Xu-dong Peng, Xiang-kai Meng. Simulation of the effects of non-Newtonian fluid on the behavior of a step hydraulic rod seal based on a power law fluid model[J]. Journal of Zhejiang University Science A, 2018, 19(11): 824-842.
@article{title="Simulation of the effects of non-Newtonian fluid on the behavior of a step hydraulic rod seal based on a power law fluid model",
author="Bing-qing Wang, Xu-dong Peng, Xiang-kai Meng",
journal="Journal of Zhejiang University Science A",
volume="19",
number="11",
pages="824-842",
year="2018",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1800096"
}
%0 Journal Article
%T Simulation of the effects of non-Newtonian fluid on the behavior of a step hydraulic rod seal based on a power law fluid model
%A Bing-qing Wang
%A Xu-dong Peng
%A Xiang-kai Meng
%J Journal of Zhejiang University SCIENCE A
%V 19
%N 11
%P 824-842
%@ 1673-565X
%D 2018
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1800096
TY - JOUR
T1 - Simulation of the effects of non-Newtonian fluid on the behavior of a step hydraulic rod seal based on a power law fluid model
A1 - Bing-qing Wang
A1 - Xu-dong Peng
A1 - Xiang-kai Meng
J0 - Journal of Zhejiang University Science A
VL - 19
IS - 11
SP - 824
EP - 842
%@ 1673-565X
Y1 - 2018
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1800096
Abstract: The rheological characteristics of the oil film on the rod-seal interface in the sealing zone have a major influence on the behavior of reciprocating seals. Because of the addition of polymers, the viscosity and temperature properties of hydraulic oil have improved and the fluid presents non-Newtonian characteristics. To investigate the influence of these characteristics on seal behavior, a soft elastohydrodynamic lubrication (EHL) numerical model is introduced to simulate a step seal under a mixed lubrication condition. A modified Reynolds equation is derived for calculating the fluid film pressure distribution more accurately. The equation is based on the power law fluid model and Jakobsson-Floberg-Olsson (JFO) cavitation theory. Results are presented to gain insight into the effect of non-Newtonian fluid characteristics on seal behavior, and the simulated results are compared to those of a Newtonian fluid to reveal the seal mechanism. The influence of operating parameters and the seal surface root mean square (RMS) roughness on sealing performance under different power law indexes is also investigated and discussed.
The research followed the form of existing research, with clear good presentation. The application of non-Newtonian fluid properties on Reynolds equations are clear. The results part of this paper highlights the novelty of this study, show the difference between pseudoplastic fluid, dilatant fluid and newtonian fluid.
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